灵鹊做题网有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
计算(x+y)(x+y)^2(-x-y)^3
1、x(x-y)(x+y)-x(x+y)^2
计算:(-x-2y) * (3x-y)
{(x,y) |x|+|y|
x>y?x:y
计算:(x-y)^2*(y-x)^2*(x-y)^6
(1)(x^2/x)-y-x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
有这样一道题,计算：（x-y)[(x+y)(x+y)-xy]-(x-y)[(x-y)(x-y)+xy]的值,其中x=20